问题
选择题
Every possible means ____ to save the wounded soldier up to now.
[ ]
A. was tried
B. were tried
C. have been tried
D. has been tried
答案
答案:D
Every possible means ____ to save the wounded soldier up to now.
[ ]
A. was tried
B. were tried
C. have been tried
D. has been tried
答案:D